Company lists · Data refreshed September 2026

Top 25 Business systems integration firms based in the United Kingdom

Name: Business systems integration firms based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 1,607 companies tracked

RevenueBase identified 1,607 business systems integration firms headquartered in the United Kingdom as of September 2026 and tracks 18,586 professional contacts across them, including 6,217 with verified work emails. London is the largest hub.

This list covers business systems integration firms headquartered in the United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 28, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 28, 2026 86% judged on-target in blind review

1,607Companies

18,586Contacts tracked

6,217Verified emails

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The 25 largest business systems integration firms based in the United Kingdom

Ranked by team size

Top 25 of 1,607 business systems integration firms based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to business systems integration firms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Lemongrass	Indirect evidence	Reading, United KingdomHQ checked Sep 28, 2026	501-1,000	504 contacts →
	Indirect evidence “Lemongrass is a global SAP-focused cloud services provider focused on enabling Enterprises to turn SAP into a strategic advantage.” Source: RevenueBase Database · checked Sep 28, 2026
2	Epi-Use Labs	Indirect evidence	Manchester, United KingdomHQ checked Sep 28, 2026	501-1,000	370 contacts →
	Indirect evidence “EPI-USE Labs is a global software solutions and managed services company.” Source: RevenueBase Database · checked Sep 28, 2026
3	Kagool	Indirect evidence	Birmingham, United KingdomHQ checked Sep 28, 2026	501-1,000	307 contacts →
	Indirect evidence “Kagool is a global technology consultancy with over 20 years of experience helping enterprise organisations modernise SAP, data and AI platforms.” Source: RevenueBase Database · checked Sep 28, 2026
4	ARCH	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	n/a	307 contacts →
	Indirect evidence “Arch has specialised in SAP solutions for over 25 years and our team has extensive experience of SAP technologies and SAP usability.” Source: RevenueBase Database · checked Sep 28, 2026
5	Acuiti Labs	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	201-500	306 contacts →
	Indirect evidence “Modern revenue growth is powered by intelligent, scalable Quote-to-Cash strategies.” Source: RevenueBase Database · checked Sep 28, 2026
6	OLR	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	201-500	292 contacts →
	Partial evidence “OLR is a specialist Oracle Retail systems integrator delivering end-to-end omnichannel solutions to enable leading retailers to accelerate business success through system…” Source: RevenueBase Database · checked Sep 28, 2026
7	Percipere	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	201-500	245 contacts →
	Indirect evidence “Percipere is a niche global consultancy, partnering companies in their evolution towards greater operational efficiency and profitability.” Source: RevenueBase Database · checked Sep 28, 2026
8	ITI Group	Indirect evidence	Sheffield, United KingdomHQ checked Sep 28, 2026	201-500	234 contacts →
	Indirect evidence “For organisations facing the compounding threats of ageing assets, a retiring workforce, and evolving cyber attacks, the status quo is no longer an option.” Source: RevenueBase Database · checked Sep 28, 2026
9	BMSI	Partial evidence	Maidenhead, United KingdomHQ checked Sep 28, 2026	201-500	218 contacts →
	Partial evidence “BMSI is the UK’s largest & leading Independent systems integrator of Building Energy Management Systems (BEMS).” Source: RevenueBase Database · checked Sep 28, 2026
10	Eappsys	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	193 contacts →
	Partial evidence “eAppSys is a systems integrator that is focused exclusively on supporting the core enterprise application systems within Oracle On-Premise and Cloud Applications.” Source: RevenueBase Database · checked Sep 28, 2026
11	Platned	Indirect evidence	Gerrards Cross, United KingdomHQ checked Sep 28, 2026	201-500	190 contacts →
	Indirect evidence “Platned helps organisations simplify complex change and get more value from their enterprise technology investments.” Source: RevenueBase Database · checked Sep 28, 2026
12	Maintel Azzurri Communications	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	501-1,000	186 contacts →
	Partial evidence “Maintel is a leading systems integrator and managed services provider, delivering effortless communications solutions to a broad spectrum of businesses in the UK and…” Source: RevenueBase Database · checked Sep 28, 2026
13	Softbrands	Indirect evidence	Farnborough, United KingdomHQ checked Sep 28, 2026	501-1,000	177 contacts →
	Indirect evidence “In 2009 SoftBrands was bought by Infor and is now a part of the Infor Hospitality Suite.” Source: RevenueBase Database · checked Sep 28, 2026
14	DOWDS	Strong evidence	Ballymena, United KingdomHQ checked Sep 28, 2026	201-500	164 contacts →
	Strong evidence “With 45+ years in business, Dowds expertise spans the full lifecycle of complex build environments – from initial design and systems integration to final handover and beyond.” Source: RevenueBase Database · checked Sep 28, 2026
15	Interex Group	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	160 contacts →
	Indirect evidence “InterEx Group is becoming the strategic partner of choice for organizations undergoing digital, business, and technology transformation.” Source: RevenueBase Database · checked Sep 28, 2026
16	Praesto Consulting	Indirect evidence	Staines-upon-thames, United KingdomHQ checked Sep 28, 2026	201-500	125 contacts →
	Indirect evidence “Technology consultancy providing expertise to complex IT programs.” Source: RevenueBase Database · checked Sep 28, 2026
17	Enterprise Outsourcing	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	201-500	125 contacts →
	Indirect evidence “Enterprise Outsourcing is a global leader in technology services, providing support to businesses in Australia, Spain, the United Kingdom, United States, Indonesia, South Africa…” Source: RevenueBase Database · checked Sep 28, 2026
18	Anthesis LTD	Indirect evidence	Congleton, United KingdomHQ checked Sep 28, 2026	51-200	121 contacts →
	Indirect evidence “Anthesis is an IFS and Infor Channel and Services Partner - reselling IFS and Infor M3 (Movex) software - we provide vital world-class ERP expertise to organisations of all sizes…” Source: RevenueBase Database · checked Sep 28, 2026
19	Infosight Consulting	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	201-500	121 contacts →
	Indirect evidence “At Infosight, we architect the future of enterprises by engineering your digital core and activating the intelligence within.” Source: RevenueBase Database · checked Sep 28, 2026
20	CINOS	Partial evidence	Frimley, United KingdomHQ checked Sep 28, 2026	51-200	119 contacts →
	Partial evidence “Cinos is an industry-leading, agile, and innovative systems integrator.” Source: RevenueBase Database · checked Sep 28, 2026
21	OCS Consulting	Indirect evidence	Borehamwood, United KingdomHQ checked Sep 28, 2026	51-200	118 contacts →
	Indirect evidence “OCS Consulting plc, established in 1984 and now an employee-owned organisation, is a leading IT Consultancy with offices in the UK, The Netherlands, Switzerland, and Belgium.” Source: RevenueBase Database · checked Sep 28, 2026
22	Bedford Consulting	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	117 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
23	European Electronique	Partial evidence	Eynsham, United KingdomHQ checked Sep 28, 2026	51-200	117 contacts →
	Partial evidence “European Electronique is a leading UK systems Integrator, specialising in the delivery of secure technology platforms including Hybrid IT, Cyber Security and Networking…” Source: RevenueBase Database · checked Sep 28, 2026
24	Envitia	Indirect evidence	Horsham, United KingdomHQ checked Sep 28, 2026	51-200	99 contacts →
	Indirect evidence “Envitia is an IT services and consulting company, specialising in complex data challenges.” Source: RevenueBase Database · checked Sep 28, 2026
25	Neosalpha Technologies	Indirect evidence	Maidenhead, United KingdomHQ checked Sep 28, 2026	51-200	97 contacts →
	Indirect evidence “NeosAlpha: Your Trusted Partner in IT Consulting and Digital Transformation Founded in the UK in 2017, NeosAlpha is a niche IT consulting and services company, that delivers…” Source: RevenueBase Database · checked Sep 28, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: business systems integration firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names business systems integration firms.
Partial evidence: Its own public description names part of business systems integration firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name business systems integration firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 1,607 business systems integration firms based in the United Kingdom

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Business systems integration firms based in the United Kingdom at a glance

As of Sep 28, 2026

33.4%Verified-email coverage

11.6Average contacts per company

1-10Median size (employees)

32.9%Largest-city concentration · London

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

952

11-50

462

51-200

148

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency is not reported for this list. Company counts and contact totals on this page are counted from the 1,607 companies this search returned, because the overall count for this search did not match them.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among business systems integration firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United Kingdom whose own description of what they do matches “business systems integration firms”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names business systems integration firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among business systems integration firms, and records with no verified work email. Companies headquartered outside United Kingdom are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 6,217 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 28, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names business systems integration firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many business systems integration firms are there based in the United Kingdom?

RevenueBase identified 1,607 business systems integration firms headquartered in the United Kingdom as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Lemongrass, headquartered in Reading, tops this list with the largest team on record.

Which city has the most business systems integration firms?

London leads with 529 headquartered companies, followed by Manchester (44) and Reading (26).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 6,217 verified decision-maker contacts tracked across these 1,607 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 28, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.